Rocks Flashcards
1
Q
What 3 main groups are rocks classified in?
A
Rocks are classified as: igneous, sedimentary and metamorphic rocks
2
Q
What is an igneous rock?
A
An igneous rock (.e.g. granite) is formed by magma from the molten inside part of the Earth. When magma erupts, it cools to form volcanic landforms.
3
Q
What is a sedimentary rock?
A
A sedimentary rock (.e.g. sandstone) has been subjected to tremendous heat and/or pressure, causing them to change into another type of rock. They are usually resistant to weathering and erosion and are therefore very hardwearing.
4
Q
What is a metamorphic rock
A
A metamorphic rock (.e.g. slate) is formed from sediments that have settled at the bottom of a lake, sea or ocean, and have been compressed over millions of years.
